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GB/T 18697-2002 English PDF (GBT18697-2002)

GB/T 18697-2002 English PDF (GBT18697-2002)

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GB/T 18697-2002: Acoustics -- Measurement of noise inside motor vehicles

GB/T 18697-2002
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 17.140.30
Z 32
eqv ISO 5128:1980
Acoustics - Measurement of noise inside motor
vehicles
ISSUED ON: MARCH 26, 2002
IMPLEMENTED ON: DECEMBER 01, 2002
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC
Table of Contents
Foreword ... 3
ISO Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Type of test ... 5
4 Test quantity ... 6
5 Measuring instruments ... 6
6 Acoustic environment, meteorological conditions, background noise ... 7 7 Test road conditions ... 8
8 Vehicle conditions ... 8
9 Microphone position ... 12
10 Measurement steps ... 13
11 Test report ... 15
Appendix A (Informative) Measurement record sheet of vehicle interior noise ... 16
Foreword
This standard is equivalent to ISO 5128:1980 "Acoustics - Measurement of noise inside motor vehicles". The technical content is consistent. Appendix A (informative) is added, for reference only.
This standard was proposed by the Chinese Academy of Sciences.
This standard shall be under the jurisdiction of the National Acoustics Standardization Technical Committee.
Drafting organizations of this standard: FAW Technology Center, Shanghai Volkswagen Co., Ltd., Shenlong Automobile Co., Ltd.
The main drafters of this standard: Lu Bingwu, Liu Shugong, Liu Yingjie, Liu Dongming, Zou Zhenhao, Bao Jingyu, Yao Zuxing.
Acoustics - Measurement of noise inside motor
vehicles
1 Scope
This standard specifies the method for measuring the noise inside motor vehicles.
This standard applies to category M and category N automobiles (category M: passenger vehicles, including cars; category N: goods vehicles, including tractors, cranes, etc.).
2 Normative references
The provisions in following documents become the provisions of this Standard through reference in this Standard. The versions indicated at the time of publication of this standard are valid. All standards are subjected to revision, AND parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable.
GB/T 3241-1998 Octave-band and fractional-octave-band filters (eqv IEC
61260:1995)
GB/T 3730.2-1996 Road vehicle - Masses - Vocabulary and codes (idt ISO
1176:1990)
GB/T 3785-1983 Electric, sonic properties and measuring methods for
sound level meters
GB/T 12534-1990 Motor vehicles - General rules of road test method
GB/T 15089-1994 Motor vehicles - Classification
3 Type of test
3.1 Confirmatory test
The measurements performed are used to verify, whether the motor vehicles provided by the manufacturer meet the noise requirements.
The conditions selected, during each measurement, must be observed.
However, if it is necessary to modify, the modification shall be explained in the

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